раскройте скобки, употребляя глаголы в present perfect и present perfect continuous
.
11. when we are going to be on top at last? we
(climb) for at least three hours and i am afraid we
tee (stop) half-way.
12. that picture (hang) here since my childhood! i
never (think) you would ask me to sell it!
13. i (wonder) all the morning what a conceited
ja young woman she (become).
14. the artificial lighting system of gas-filled tubes
(give) a clear daylight effect ever since it was intro-
duced in our city. we (find) it a great boon especially
on dark days in our office.